Three years ago, Serizawa was troubled with about his psychic powers. One day, he was visited by the boss, Suzuki Toichiro. Serizawa ends up trusting him since he's the first person to understand what he's going through. But Mob then brings up the fact that Serizawa is being used and tells him, "I'll be your friend." Hearing Mob say that, Serizawa... 

Meanwhile, after defeating Sho, the boss starts gathering up the energy he was sharing with his followers and turns into an energy monster.
I am able to share my power with others.
أستطيع مُشاركة قوّتي مع الآخرين
Ich kann meine Energie
an andere abgeben
Soy capaz de entregarle
 mi energía al resto.
Soy capaz de entregar
mi energía a los demás.
Je suis capable de partager
mon énergie avec les autres
Un potere che posso condividere con altre persone.
Eu sou capaz de compartilhar 
meu poder com os outros.
Я могу раздавать
свою энергию другим,